Dimethylformamide → HCID 9818644, compound

Participants

Reaction Steps

A solution of potassium t-butoxide (1M in t-butanol, 11, 1 mol) was added dropwise to a stirring solution of ethyl 3-methylphenyl acetate (178 g, 1 mol) in N,N-dimethylformamide (2 l). A solution of 4-cyanopyridine (104.11 g, 1 mol) in N,N-dimethylformamide (1 l) was pumped into the reaction mixture over a period of about 4.5 h. The mixture was then stirred at room temperature for 3 h, before the dropwise addition of a solution of methyl isothiocyanate (68.4 ml, 1 mol) in N,N-dimethylformamide (50 ml) over a period of 10 min. After stirring for 1 h at room temperature, the reaction mixture was cooled to 3° C. and methyl iodide (62.3 ml, 1 mol) was added dropwise over a period of 10 min. Stirring was continued at room temperature overnight. The mixture was cooled to 3° C. and water (4 l) was pumped into the reaction mixture over a period of 6 h. The precipitate was removed by filtration, washed with water and dried in a vacuum oven to give the title compound. MS (m/z).: 324 (M+H)+; C18H17N3OS requir. 323.4.

Provenance & Evidence